He himself, in a dramatic statement from his deathbed, accused his former employers at the Kremlin of being responsible for his murder.

Who was Alexander Litvinenko? What had happened in Russia since the end of the Cold War to make his life there untenable, and even in severe jeopardy in Britain?

How did he really die, and who killed him? In his spokesman and close friend, Alex Goldfarb, and widow Marina, we have two people who know more than anyone about the real Sasha Litvinenko, and about his murder.

Their riveting book sheds astonishing light not just on these strange and troubling events but also on the biggest crisis in relations with Russia since the fall of the Berlin Wall.